Method for manufacturing solid mandrel of insulator

Abstract

The invention discloses a method for manufacturing a solid mandrel of an insulator. According to the method, a basic bar is manufactured by drawing an epoxy resin composite material by a pultrusion process; the basic bar is used as a base body, and one or more epoxy resin composite material pultrusion diameter-expansion processes are adopted. The diameter of the basic bar is between 70 and 90 millimeters; and in each epoxy resin composite material pultrusion, the diameter expansion amount of the basic bar is that: the cross section is expanded to be no more than 5,000 square millimeters. The epoxy resin composite material is a continuous glass fiber bundle dipped in epoxy resin glue solution. The method for manufacturing the solid mandrel of the insulator uses the basic bar as the base body and adopts one or more epoxy resin composite material pultrusion diameter-expansion process. The equipment and the process for manufacturing the basic bar can be adopted in the diameter expansion process, so the method has the advantages of simple process, easily controlled uniformity and equipment investment saving. The pultrusion diameter-expansion process also ensures that the mandrel has uniformly distributed glass fiber bundle and better mechanical performance.

Description

technical field [0001] The invention relates to an insulator used in high-voltage electric transmission equipment, more specifically to a method for manufacturing a solid core rod of an insulator, and belongs to the technical field of electric equipment. Background technique [0002] Insulators are necessary for high-voltage and ultra-high-voltage power transmission lines. At the earliest, there were only porcelain and glass insulators. By the 1970s, high-temperature vulcanized silicone rubber composite insulators were first introduced in Germany. Compared with traditional insulators such as porcelain and glass, It has the advantages of light weight, high strength, strong pollution flashover resistance, convenient maintenance and transportation. In recent years, composite line post insulators have also developed rapidly in our country. [0003] Existing post composite insulators are composed of upper and lower metal accessories, mandrels and sheds outside the mandrels. The ...

AI Technical Summary

Problems solved by technology

The hollow mandrel is filled with sulfur hexafluoride gas. The main problem of the pillar composite insulator produced by this mandrel is that it is often necessary to detect the content of sulfur hexafluoride gas in the mandrel, which leads to inconvenience in use, and hexafluoride Sulfur gas also has a certain impact on the environment

However, its mechanical strength needs to be further improved, and the production efficiency of the winding process is low, the process is complicated, and the uniformity control of winding is high.